Answer:
39.97 years
Step-by-step explanation:
The compound interest formula is ...
A = Pe^(rt)
Solving for t gives ...
ln(A/P)/r = t
t = ln(45600/1300)/0.089 ≈ 39.97 . . . years
It will take 39.97 years for $1300 to grow to $45,600 when earning 8.9% interest compounded continuously.